Drier



(No Model.) 3 Sheets-Sheet 1 H. T I LD E N. Drier.

No. 232,572. Patented Sept 21, Iss0.

a a F: I

N. PEIERS. PHOTO-L THOGRA WASNINGTON o C 3Sheets-Sheet 2. H; TILDEN. Drier.

(No Model.)

No. 232,572. Patented Sept. 21,1880.

N. PETERS. PHOTO-UTHQGRAPHER, wAsmNsToN, D 64 (No Model.) ,3 Sheets--Sheet 3.

H. TILDEN.

UNITED; f STATES,

PAT NT OFFICE.

. nen RY TILDEN, on KELLoee, IOWA.

DRIER.

'srncrnrcnrronrorm'in "part of Letters mat No. 232,572; datedSeptem'ber 21, 1880. I Application filed March 5, 1880. No modell) 7 To all whom it may concern; I

Be it known that I, HENRY TILDEN, of Kellogg, Jasper county, State of Iowa,have invented certain new and useful Improvements in Driers; andI hereby declare the following to be afull, clear,- and exact descriptionthereof, reference being had to the accompanying drawings, making part of this specification, in which- I Figure 1 is a perspective viewof my improved dry-house. Fig. 2 is a longitudinal vertical section on line y y of Fig. Fig. 3 is a verti-. cal section on line :0 00 of Fig. 2. Fig. 4 is ahorizontal section on line 2 z of Fig. 2.

The object of my invention is to provide a drying-house which will rapidly and effectually remove allmoisture from vegetables, fruits, an d cereals for the purpose of desiccating them.

My invention consists in the combinationof devices hereinafter described and claimed.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the exact manner in which I have carried it out. a I

.. In the said drawings,A B illustrate the lower part of my dry-house, constructed of brick, and G D the drying-chambers, which are housed in anydesirablemannen, Built intothelowerpor- I h tion of the house are aserie's of sets offurnaees,

E F, two of which I will specifically. describe,

the others all being similarly constructed.

ThefurnaceE extendslon gitudinally through 1' the lower portion of the house, being provided at one end with a fire-box, e, and at the other end with a chimney-flue, 6, having a proper stack, 6, to give a good draft. The top and bottom of the furnace proper formed of I cast-metal plates 12 p, which are perforated throughout their extent for the reception of tubes t, preferably made ofthree-quarter-inch gaspipe, which have their ends open below the bottom plate, 2, and above the top plate, 1). Underneath the furnace isan air-chain be'r, G, divided by a perforated wall, 9, and divided from the'ash-pit of the furnace by walls 2, and from which the air passes throughtubes t, being highly heated in its passage, to thedryingchambers above plates 19. Adjacentto stacks c are flues ff, through which air is forced to air-chambers G by means of blower-fans 3 3, and as theair passes downward it absorbs more or less of the caloric escaping through the stack and utilizes itas it passes through the tubes 15 to the dryingchambers.

I li-nd that the direct action of the tire in the fire-boxes on that portion of plates 19 (which are usually of cast-iron} adjacent to the fire boxes, from. its intensity, so unequally heats the plates that they soon sag downand break.

To obviate this difficulty a small flue, 4., is pro; vided, which opens directly over the furnace and throws, by means of a fan-blower, 5, diagonally and downwardly a blast of air directly upon. the highly heated portions of plates 10',

equalize the small currents of heated air which.

are pouring through tubes t.

. Itwill be seen that each furnace of a pair is made to alternate as to the location of the firebox, the fire-box of one furnace being contiguous to the rear and smoke-flue of the other, as seen in Figs. 8 and 4. By this arrangement of the furnaces end for end there is an equilibrium of temperature kept in the two furnaces, largely due to the radiation from the division-wall, the hottest part of one furnace lying against the coolest part (or part most remote from the firebox) of the other. The perforated partition g enables the air in the airchambers below-the furnaces to keep up a constant circulation to and fro, and consequently tends to keep the air in the two furnaces at a mean temperature to enter pipes 15 t.

Above each pair of furnaces is a dryingchamber, H, in which are drawers or trays h, to receive the article to be dried, said chamber terminating in a series of peaked or cone-shaped tops. From the apex of each cone rises a pipe,

P, provided with a chamber, 7, for an exhaust- 7 fan, through which to draw the air laden with the moisture from the material to be dried.

The exhaust-fans are preferably all driven from pulleys on a centrally-located shaft, S.

When two series of furnaces are used, as at present illustrated, the pipes P can be inclined toward each other and open into a larger pipe, 1?, opening into the air.

In arranging the drying pans or drawers I cover them on the outside by closely-fitting doors, and the lowest tray in each vertical series I make of la much finer mesh than those above, for the reason that, as the hot draft through the drying-chamber keeps the cereals or fruits, if in small particles, in constant motion, the lower fine-mesh tray catches everything that is sifted. through and prevents anything from falling on the hot plates of the furnace below.

Any number of sets or pairs of furnaces arranged as set forth may be combined in one dryi n g-house without departing from the spirit of my invention.

Having described my invention, I claim as new and desire to secure by Letters Patent- 1. In a drier, a series of furnaces arranged HENRY TILDEN. Attest:

R. K. EVANS, WM. F. MORSELL. 

